diff options
| -rw-r--r-- | arch/x86/include/asm/fpu/types.h | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h index a32be07f1418..c72cb2269adc 100644 --- a/arch/x86/include/asm/fpu/types.h +++ b/arch/x86/include/asm/fpu/types.h @@ -322,8 +322,32 @@ struct fpstate { /* @user_xfeatures: xfeatures valid in UABI buffers */ u64 user_xfeatures; + /* @is_valloc: Indicator for dynamically allocated state */ + unsigned int is_valloc : 1; + + /* @is_guest: Indicator for guest state (KVM) */ + unsigned int is_guest : 1; + + /* + * @is_confidential: Indicator for KVM confidential mode. + * The FPU registers are restored by the + * vmentry firmware from encrypted guest + * memory. On vmexit the FPU registers are + * saved by firmware to encrypted guest memory + * and the registers are scrubbed before + * returning to the host. So there is no + * content which is worth saving and restoring. + * The fpstate has to be there so that + * preemption and softirq FPU usage works + * without special casing. + */ + unsigned int is_confidential : 1; + + /* @in_use: State is in use */ + unsigned int in_use : 1; + /* @regs: The register state union for all supported formats */ - union fpregs_state regs; + union fpregs_state regs; /* @regs is dynamically sized! Don't add anything after @regs! */ } __aligned(64); @@ -364,6 +388,14 @@ struct fpu { struct fpstate *fpstate; /* + * @__task_fpstate: + * + * Pointer to an inactive struct fpstate. Initialized to NULL. Is + * used only for KVM support to swap out the regular task fpstate. + */ + struct fpstate *__task_fpstate; + + /* * @__fpstate: * * Initial in-memory storage for FPU registers which are saved in @@ -379,6 +411,16 @@ struct fpu { }; /* + * Guest pseudo FPU container + */ +struct fpu_guest { + /* + * @fpstate: Pointer to the allocated guest fpstate + */ + struct fpstate *fpstate; +}; + +/* * FPU state configuration data. Initialized at boot time. Read only after init. */ struct fpu_state_config { |